These guys are hilarious when they are being hand-fed (I have only seen this on TV). They will actually queue up to take turns and so on , and are really insistent. I think this would be a spectacular show in an aquarium, ; does any body know if any aquaria are already doing this? The only drawback I can think of is that it would only be practical in a large aquarium.Otherwise, even a small number of visitors would already be a crowd in front of a small glass frontage.
They did feed them while I was there. And I was the only person around so there was no problem with getting a view. Hard to get a photo though as they tend to grab it in the blink of an eye.